Grooving-machine



(No Model.) sheets-.sheet 1.

y W. L. DAVIS. @MOVING MACHINE.

No. 496,868. ented May 9, 1893.

(No Model.) s Sheets-sheet 2. W. L.v DAVIS. GROOVING MACHINE.

No. 496,868. y' Patented May 9', 18%.l

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UNITED STATES PATENT OFFICE.

WESTON L. DAVIS, OF LEWISTON, MAINE.

cRoovlNG-MACl-HNE.

SPECIFICATION forming part 0f Letters Patent No. 496,868, dated May 9,1893. Application filed March 8, 1892. Serial No. 424,125. (No model.)

To @ZZ whom t may concern,.- Y

Be it known that I, WESTON L. DAvIs, a citizen of the United States,residing at Lewiston,

in the county of Androscoggin and State of Maine, have invented certainnew and useful Improvements in Grooving-Machines; and I do declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to the letters marked thereon, which form part of thisspecification.

My invention relates to wood working machines and more particularly tothat class of machines designed to cut grooves or channels in strips ofwood, and its novelty consists in the construction and adaptation of theparts as will more fully hereinafter appear. y

Primarily, my invention is intended is produce a mechanism whereby aseries of grooves on either or both sides of a prepared strip of woodmay be simultaneously cut, either at right angles or obliquely to thelongitudinal axis of the said strip.

Heretofore, in the manufacture of the side pieces for window frames andsimilar articles, it has been customary to cut the vfour or more groovesrequired upon a saw bench and to handle the strip operated uponfrequently and with considerable care. By the use of my invention, thework, when once placed in position, and the cutters adj usted, isautomatically and rapidly grooved and requires no handling and noattention beyond that obtained from comparatively unskilled labor.

My invention consists, in brief, of an upright frame or table supportingtwo or more carriages which are made longitudinally adjustable and whicheach carry a pair of revolving cutters or dado heads, one of each pairbeing below and the other above the plane of the strip to be operatedupon. The cutters are adjustable vertically and are actuated by suitablemechanism from the main driving shaft. They are capable of a transversereciprocating motion also upon. their carriages and, in the form ofmyinvention which I have chosen to illustrate, they are so actuated thattheir forward motion while moving against the work is slower than theirbackward motion.

`a longitudinal section of the carriage guide and cutter designed tomove at an oblique angle to the work and Fig. 6 is a plan view of thesame. Fig. 7 is a top plan View of the machine with the cutters andclamping mechanism removed. Fig. 8 is an elevation of the cam plate.Fig. 9 is a diagram of the gearing actuating the same and Fig. lOis aperspective of a strip groovedby .the machine.`

In the drawings, F is an upright frame or table constructed of wood inthe usual manner, braced and secured in place where necessary andrequiring no particular description. This frame F is provided withlongitudinal guidesor ways G, G which support two cross pieces f and fupon which are secured, in any suitable manner, two upright brackets Band B. Each of these brackets is vertically slotted on its front face atb to admit ot the rear end of a clamp Cvertically adjustable in the saidslot. The clamp C is pivotally secured to the lower end of a threadedrod c which passes upward through a hand wheel c secured by a collar tothe lower end of a sleeve s terminating at its upper extremity in astrap e encircling an eccentric e pivoted upon and secured to a shaft Smounted upon suitable bearings supported from the frame F by standards sand the brackets B and B and provided with a handle 8 by which the shaftcan be turned. The clamp C and the cross piece f serve as jaws betweenwhich the work is rigidly secured in place. By means of the threaded rodc and the hand wheel c the clamp can be raised or lowered so as to admitof the insertion underneath it of strips of different thickness whilepermitting permanent adjustment for strips of substantially the samethickness. After such approximate adjustment has been made the.horizontally adjustable by means of screws I and l adapted to revolvein suitablebearings and passing through a threaded flange 't' extendingfrom the bottom of each carriage. The screws I and I' are controlled andoperated by means of a hand wheelJ suitably inoulltedgand gearedthereto. Eac carriage is provided on its upper side wit' guides ya whichcarry a saddle a' upon which is secured a bracket K supporting thecutter and pulley shaftm of the upper one Mof the pair of vcutters, andan arm K' supporting a pulleyP at its outer extremity. Depending fromthe saddle, is a lower sliding piece a" which carries the lower one, M',of the pair of cutters and its power connections. The pulley shaft m ismade vertically adjustable in slides lo provided therefor by means ofthe threaded rod lc' and the hand wheel 7o". At the back of thecarriage, and pivotally secured to the arm K, is a link l the uses ofwhichwill presently appear. The cutters and their shafts and pulleys aremounted in the usual man- I ner and require no particular description.

The carriage A is in all respects similar to the carriage A', exceptthat its bed plate is divided horizontally into two sections the lowerone of which T islixed upon the ways G and G' and adapted to slidethereon and is curved downward at t" to admit of the passage of thelower one of the pair of cutters and the upper section of which, Vcarries the mechanism Supportingv the cutters and their powerconnections in the manner just explained. This section V is pivoted tothe bed plate T at its rear end at t and, atits front end, is providedwith a curved slot o and binding screw 'u' by means of which it is maderadially adj ust-able upon the said bed plate and the cutters which itcarries can be held at an oblique angle to the work.

At the rear of the machine, and revolving suitable bearings thereon, isthe main driving shaft L receiving motion froma source of power notshown through the pulley N. Also mounted upon the shaft L, are thepulleys O and O' which are horizontally adjustable by means of keys, orother similar means, and which impart motion respectively to therevolving cutters through the beltsQ and Q'. In each pair of cutters,the belt passes around the driving pulley, over two deflecting pulleys pandp' mounted on the rear of the cutter carriage, thence it passesforward to the pulleys of the upper and lower cutters and over anintermediate reversing pulley p" mounted on the upper cutter bracket andbackward to the pulley Pat the rear of the arm K'. This arrangement ofthe belt secures the rotation of the cutter shaft no matter what may bethe position of the carriage, or saddle, as the lengt-h of the beltremains the same for all positions of the saddle.

A rock shaft R is mounted in suitable bearings at the rear of themachinebehind the driving shaft and carries levers r adjustably mounted thereonby keys, or other suitable means, and which, through the links Zpivotally secured thereto and to the arms K' and K', impart areciprocating motion to the cutter carriages and the mechanism whichthey support. At the extreme left of the rockshaft R, and rigidlysecured to it and depending therefrom, is a link Y slotted at y at itslower extremity to admit of the passage of a pin y' secured at the outerextremity of a horizontal link X which is itself slotted at its innerend and adapted to engage with a pin 0c' moving in a double cam-shapedguide z in a plate Z mounted upon a shaft supported in suitablebearings-underneath the frame F and to which motion is, as required,imparted from a driving shaft L through intermediate belting L' and L"passing over suitable pulleys and the train of gearing Z. The belts L'and L" are adapted to constantlyrevolve. A clutch I-l is splined to itsshaft while the pulley H" is loose. The hand lever H, which is suitablyIsupported in bearings, being pulled to the right, the clutch Il isthrown into engagement with ythe pulley I-l" and the train of gearing Z'is thus set into motion. This causes the cam Z to revolve. The pin azmoving in the cam guide z carries with it the horizontal link X which,in turn, through its rigid connections, starts the rock shaft R forward.As the cam plate Z continues to revolve, the link X is finally pulled inthe reverse direction and the rockshaft is pulled back. When arevolution has been completed,the trip h mounted on the shaft of theplate Z strikes a similar pin mounted on the shaft of the clutch H" andautomatically throws it out of engagement and consequently the gearingZ' stops in a manner readily understood by those skilled in the art. Thedouble guide z is made of such a shape that the slotted link X is madeto move forward more rapidly than back ward and consequently through therock shaft R and its connections has a reverse effect upon the motion ofthe saddles and cutters which they carry.

The operation of the machine will be readily understood by one who hasclosely follo-wed the foregoing description.V The strip of wood to beoperated upon is first placed upon the transverse pieces fand f', theclamps C are then brought down into a proper posivtion to grip itapproximately and it is rigidly forced down upon the strip by pullingforward the handle s'", by this means turning the eccentric shaft S andeccentric e' and so IOO IIO

forcing downward the sleeve thus been rigidly secured in position, themovable section V of the carriage A is adjusted in position by means ofthe set screw o so that the groove to be cut by the pair of cuttersmounted onthis carriage shall be at the desired angle. Motion is thenimparted from the main driving shaft, through the pulleys O and O andtheir connections, to the two pairs of revolving cutters. The hand leverH is then pulled to the right, the actuating mechanism of the cam plateZ thus thrown into gear and the plate turned,thus carrying with it thepin which acting upon the links X and Y, through them upon the rockshaft R, upon the levers r, pushes the saddles of the carriages uponwhich the cutters are mounted forward against the work and then with aquicker motion pulls them backward. When this operation is completed, itwill be found that each pair of cutters has simultaneously cut upon theopposite sides of the strip par allel grooves, those made by the lefthand pair at right angles to the longitudinal axis of the strip, andthose made bythe right hand pair at an oblique angle thereto.

In the drawings, I have shown the cutters of the kind known in the artas dado heads but they may be of any practical shape and style. ln fact,wide modifications.' may be made in the details of my invention withoutdeparting from its essential principles. More carriages and cutters maybe used and they may all be radially adjustable and capable of cuttinggrooves at a variety of angles. The differential motions of the forwardand backward motion of the saddles may be accomplished by mechanicalequivalents of the links and cam plate by combinations of cams andlevers, and mechanical equivalents of other details will occur more orless spontaneously to those skilled in the art.

Having described my invention, what I claim as new is- 1. In a groovingmachine, the combination with means for securing the work in place, of aplurality of pairs of rotary cutters provided with suitable actuatingmechanism, the cutters of each pair adapted to operate on opposite sidesof the work and one pair of which is radially adjustable, and all ofwhich are adapted to move simultaneously against the Work while the saidcutters are in operation, as and for the purposes described.

2. In a grooving machine, the combination with a plurality of pairs ofrevolving cutters and suitable actuating mechanism therefor, ofcarriages carrying said cutters in pairs and one or more of saidcarriages provided with a radially adjustable section whereby the saidcutters when in operation are moved against the work to cut pairs ofgrooves on opposite sides thereof at different angles to the axis of thework, as and for the purposes described.

3. In a grooving machine, the combination and the clamp to which it isattached. The strip havingv Withfmeans for securing the work in place,of a plurality of pairsv of revolving cutters, each'pair of cuttersbeing horizontally and vertically adjustable and actuated by suitablemechanisrmwhereby their motion against the work is slower than theirmotion away therefrom, substantially as described.

4. In a grooving machine provided with horizontal ways adapted toreceive the same, a cutter carriage consisting of (l) a bed platesupported on said ways and horizontally adjustable thereon, (2) a saddleadapted to move transversely on said bed plate and carrying the cutterscutter shafts and their power connections, and (3) means forreciprocating said saddle, as and for the purposes set forth.

5. I`n a grooving machine, the combination with adjustable cuttercarriages carrying reciprocating saddles supporting the shafts of saidcutters and their pulleys, of the said cutters mounted upon said shafts,one vof each pair below and the other above the planeof the work andeither, or both, vertically adj ustable, 'as and for the purposes setforth.

6. In a grooving machine, the combination with means for securing thework in place and a` cutter carriage having abcd plate restingvon waysand horizontally adjustable thereon, of a movable section and radiallyadjustable thereon and adapted to support a pair of revolving cuttersand their power connections secured above said bed plate, as and for thepurposes described.

7. Ina groovin g machine provided with cutter carriages carryingreciprocating saddles each supportinga pair of cutters, one below and'one above the -plane of the work, means for actuating the said cuttersconsisting of a beltv passing around a pulley to which motion isimparted from a source of power, thence over deiiecting pulleys forwardto a pulley mounted on the shaft of each cutter and a reversing pulleyplaced between them and backward to a pulley supported from said saddlein suitable bearings.

8. In a grooving machine provided with cutter carriages each carryingreciprocating saddles and supporting a pair of cutters one below and theother above the plane Vof the" work, means for actuating the saidcutters IOO IIO

whereby they are each kept in rotation indel pendently of the positionof the said saddles on their respective carriages.

9. In a grooving machine, the combination with revolving cutters mountedin pairs on reciprocating saddles supported on adjustable carriages, ofmeans for reciprocating said saddles whereby the motion of the cuttersagainst the work is slower than thel motion `away therefrom.

10. In a grooving machine, the combination with revolving cuttersmounted in pairs on reciprocating saddles, of levers pivoted to saidsaddles and operated from a rock shaft mounted in suitable bearings, andto which motion is imparted from the driving shaft through intermediatelinks and gearing,

whereby the forward motion imparted to the of the said link is made morerapid in one disaid saddles is slower than the backward morection thanthe other. 1o tion thereof. In testimony whereof I affix my signature inI 1l. In a grooving machine, the combination presence of two Witnesses.5 with the moving Glitter saddles and the in- WESTON L. DAVIS.

termediate levers and rock shaft acting there- Witnesses: on, of thelink X slotted as described and the ARTHUR C. SPRAGUE,

cam plate Z and pin whereby the motion ALBERT E. TINGEOY.

